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参数资料
| 型号： | OM5730 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | STB5860 (Set-Top Box) STB concept(STB5860机顶盒初步设计) |
| 中文描述： | STB5860（机顶盒）机顶盒的概念（STB5860机顶盒初步设计） |
| 文件页数： | 10/20页 |
| 文件大小： | 80K |
| 代理商： | OM5730 |
1999 Aug 25
10
Philips Semiconductors
Preliminary specification
STB5860 (Set-Top Box) STB concept
OM5730
4
HARDWARE
4.1
IC list
Table 1
Description of system ICs
4.2
Main board
4.2.1
SAA7219
The SAA7219 (TMIPS) is a CPU for MPEG2 stream
transport; it includes a MIPS R3000 microcontroller core
and several peripheral interfaces such as UARTs, I
2
C-bus
units, an IEEE 1394, and an IEEE 1284 (Centronics)
interface.
The SAA7219 receives transport streams through a
versatile stream input interface capable of handling both
byte-parallel and bit-serial streams, in various formats,
supportingdatastreamsuptoandincluding13.5 Mbytes/s
(108 Mbits/s).Thestreamdataisfirstappliedtoanon-chip
descrambler incorporating DVB descrambling algorithms,
on the basis of 6 control word pairs stored in on-chip RAM.
Demultiplexing is subsequently applied to the stream, to
separate up to 40 individual data streams.
The demultiplexer section includes clock recovery and
timebase management.
Program Specific Information (PSI), Service
Information (SI), Conditional Access (CA) messages and
private data is selected and stored in external memory, for
subsequent off-line processing by the internal R3000
microcontroller core.
4.2.2
SAA7215
Table 2
SAA7215 family
The SAA7215 is a MPEG2 source decoder which
combines audio decoding and video decoding.
AdditionallytothesebasicMPEGfunctionsitalsoprovides
means for enhanced graphics, background display and/or
on-screen display as well as encoding of output video.
Due to an optimized architecture for audio and video
decoding, maximum capacity in external memory and
processing power from the external CPU is available for
graphic support.
4.3
Front-end
The front-end allows reception of channels transmitted by
satellite received via a satellite dish in combination with a
LNB. The outdoor unit can be controlled with:
OFF/14 V/18 V pouring for polarisation steering
22 kHz tone switching control for band switching
Digital Satellite Equipment Control (DiSEqC) V1.0.
4.4
Front panel
4.4.1
LNB
INTERFACE
MastertransmitterDiSEqCcontrolisprovidedand14/18 V
switching is routed through the digital board to the
front-end utility connector. The possibility to disable the
DiSEqC on the front panel, allows for the next generation
QPSK front-end which will have DiSEqC control.
4.4.2
IR
The on-board microcontroller decodes the IR commands
in RC5/6 format and relays via the serial link to the
SAA7219.
4.4.3
K
EYS
STANDBY, UP, DOWN, LEFT, RIGHT, OK and MENU
4.4.4
SCART
CONTROL
Pin 8 control as per the SCART specification for 16
×
9
and 4
×
3.
HARDWARE
DESCRIPTION
Channel module
SD1288MK2
TDA8044
tuner
satellite demodulator and decoder
Front panel board
87C524
microprocessor
Main board
SAA7219
descrambler; demultiplexer and MIPS
core
audio; video; graphics and digital
encoder
link and physical layer of 1394
link and physical layer of 1394
audio DAC
smart card interface
SAA7215
PDI1394L11
PDI1394P11
UDA1320
TDA8004
TYPE NUMBER
MACROVISION
SECAM
SAA7215HS/C2
SAA7216HS/C1
SAA7221HS/C1
no
yes
no
no
no
yes
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